.header {
  height: 80px;
  background-color: rgb(226, 145, 247);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 40px;
  color: rgb(253, 249, 249);
  position: relative;
}

.header > span {
  color: red;
  font-size: 20px;
  position: absolute;
  height: 40px;
  right: 50px;
  top: 50%;
  margin-top: -15px;
  line-height: 30px;
  cursor: pointer;
}

.header > span > .avatar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

.header > span > .avatar > img {
  width: 40px;
  height: 40px;
  border-radius: 20px;
  margin-right: 2px;
}

.header > span > .options {
  display: none;
  position: absolute;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100px;
  height: 80px;
  background-color: #Fff;
  border: 1px solid #ccc;
  border-radius: 3px;
  box-shadow: #555 0px 0px 5px 1px;
}

.header > span > .options::before {
  content: '';
  width: 0px;
  height: 0px;
  position: absolute;
  left: 10px;
  top: -20px;
  border: 10px solid transparent;
  border-bottom: 10px solid #fff;
}

.header > span:hover > .options {
  display: flex;
}

.header > span > .options > li:hover {
  background-color: rgb(255, 94, 94);
}

.nav {
  height: 60px;
  line-height: 60px;
  border-bottom: 1px solid #ccc;
  display: flex;
  justify-content: space-between;
}

.banner {
  width: 1180px;
  height: 940px;
  margin: 20px auto;
}

.banner .item {
  background-position: center;
  background-repeat: no-repeat;
  background-size: 100%;
}

.banner .item > a {
  width: 100%;
  height: 100%;

}
